because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference

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问题 because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.(Passage One)

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答案因为在实验室里他们还不能使这样的影响再次产生,他们现在还无法知道这样的电磁波干扰是否危险。

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